| /** |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package org.apache.kafka.streams.processor; |
| |
| import org.apache.kafka.clients.consumer.ConsumerRecord; |
| |
| /** |
| * Retrieves built-in timestamps from Kafka messages (introduced in KIP-32: Add timestamps to Kafka message). |
| * |
| * Here, "built-in" refers to the fact that compatible Kafka producer clients automatically and |
| * transparently embed such timestamps into messages they sent to Kafka, which can then be retrieved |
| * via this timestamp extractor. |
| * |
| * If <i>CreateTime</i> is used to define the built-in timestamps, using this extractor effectively provide |
| * <i>event-time</i> semantics. |
| * |
| * If you need <i>processing-time</i> semantics, use {@link WallclockTimestampExtractor}. |
| */ |
| public class ConsumerRecordTimestampExtractor implements TimestampExtractor { |
| @Override |
| public long extract(ConsumerRecord<Object, Object> record) { |
| return record.timestamp(); |
| } |
| } |